Real Estate Assets, Net - Single-Family Properties and Land (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) property	Dec. 31, 2018 USD ($) property	Dec. 31, 2017 USD ($) property
Land:
Financing receivable, before allowance for credit loss, noncurrent	$ 30,700	$ 0	$ 7,000
Premiums and other receivables	$ 1,200	$ 0	$ 1,500
Single family homes
Single-family properties:
Properties sold | property	1,330	691	923
Net proceeds	$ 248,199	$ 105,394	$ 72,611
Net gain on sale	43,507	16,313	3,573
Land:
Net proceeds	3,205	763	0
Net gain on sale	$ 366	$ 220	$ 0